std::get(std::tuple)
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| template< std::size_t I, class... Types > typename std::tuple_element<I, tuple<Types...> >::type& |
(1) | (начиная с C++11) |
| template< std::size_t I, class... Types > typename std::tuple_element<I, tuple<Types...> >::type&& |
(2) | (начиная с C++11) |
| template< std::size_t I, class... Types > typename std::tuple_element<I, tuple<Types...> >::type const& |
(3) | (начиная с C++11) |
Извлекает элемент
Ith элемент из кортежа. I целое значение в [0, sizeof...(Types)).Original:
Extracts the
Ith element element from the tuple. I is an integer value in [0, sizeof...(Types)).The text has been machine-translated via Google Translate.
You can help to correct and verify the translation. Click here for instructions.
You can help to correct and verify the translation. Click here for instructions.
Содержание |
[править] Параметры
| t | - | кортежа, содержимое которого нужно извлечь
Original: tuple whose contents to extract The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions. |
[править] Возвращаемое значение
1)Ссылка на
2) Ith элемент t.Original:
Reference to the
Ith element of t.The text has been machine-translated via Google Translate.
You can help to correct and verify the translation. Click here for instructions.
You can help to correct and verify the translation. Click here for instructions.
RValue ссылкой на
3) Ith элемент t, если элемент имеет именующее ссылочного типа, в этом случае именующее ссылка возвращается.Original:
Rvalue reference to the
Ith element of t, unless the element is of lvalue reference type, in which case lvalue reference is returned.The text has been machine-translated via Google Translate.
You can help to correct and verify the translation. Click here for instructions.
You can help to correct and verify the translation. Click here for instructions.
Const ссылкой на
Ith элемент t.Original:
Const reference to the
Ith element of t.The text has been machine-translated via Google Translate.
You can help to correct and verify the translation. Click here for instructions.
You can help to correct and verify the translation. Click here for instructions.
[править] Исключения
[править] Пример
#include <iostream> #include <string> #include <tuple> int main() { auto t = std::make_tuple(1, "Foo", 3.14); std::cout << "(" << std::get<0>(t) << ", " << std::get<1>(t) << ", " << std::get<2>(t) << ")\n"; }
Вывод:
(1, Foo, 3.14)
[править] См. также
accesses an element of an array (шаблон функции) | |
| (C++11) |
доступ к элементу pair Original: accesses an element of a pair The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions. (шаблон функции) |